Monitoring off-resonance signals with SHARPER NMR - the MR-SHARPER experiment.

Monitoring off-resonance signals with SHARPER NMR - the MR-SHARPER experiment.
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使用 SHARPER NMR 监测非共振信号 - MR-SHARPER 实验。

DOI:
10.1039/d2an00134a
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发表时间:
2022
期刊:
The Analyst
影响因子:
--
通讯作者:
Davy M
Davy M
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文献类型:
--
作者:
Davy M

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我们证明了扩展SHARPER(敏感的均匀和重新聚焦峰在真实的时间)NMR实验,允许一个以上的信号被同时监测,同时仍然给超尖锐,同质和异质去耦NMR信号。这在磁场不均匀性通常会使NMR成为有问题的工具的情况下尤其有价值,例如当在反应监测期间发生气体逸出时。最初报道的SHARPER实验仅适用于单个共振NMR信号,但在这里,我们证明了可以开发多共振SHARPER方法,该方法原则上可以同时获得多个共振/非共振信号,同时保留亲本序列的理想特性。在实践中,两个共振的情况下,例如反应物和产物的情况下,大多数时间将被考虑用于MR-SHARPER,如这里所示。
We demonstrate an extension to the SHARPER (Sensitive Homogenous and Refocussed Peaks in Real Time) NMR experiment which allows more than one signal to be monitored simultaneously, while still giving ultra-sharp, homo- and hetero-decoupled NMR signals. This is especially valuable in situations where magnetic field inhomogeneity would normally make NMR a problematic tool, for example when gas evolution is occurring during reaction monitoring. The originally reported SHARPER experiment only works for a single, on-resonance NMR signal, but here we demonstrate the Multiple Resonance SHARPER approach can be developed, which in principle can acquire multiple on-/off-resonance signals simultaneously while retaining the desirable properties of the parent sequence. In practice, the case of two resonances, e.g. those of a reactant and a product, will most of the time be considered for MR-SHARPER, as illustrated here.
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